USA

Lake Mead: Mechanized Tunnelling under high Pressure

Las Vegas the famous Nevada resort city with its casinos and entertainment-business, draws 90 percent of its water from Lake Mead. This largest reservoir in the United States is fed by the Colorado River. The areas around Las Vegas, however, are taking more from the lake than flows into it as snow melt and rain water from the Rocky Mountains. During the 14 years of drought, the water level has dropped by 35 m. The two existing water intakes for the Las Vegas Valley are in danger of running dry, and Intake No.1 could be at risk as early as this summer. It is now only 24 feet (7 m) below the...

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Herrenknecht

On the occasion of the World Tunnel Congress Herrenknecht presents itself as the pioneer in mechanized tunnelling. Using Herrenknecht Tunnelling Systems, modern tunnels worldwide are created safe and...

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Issue 2009-04 USA

Lake Mead Intake Tunnel No. 3

Project Background The Colorado River originates in the Rocky Mountains, fed primarily by the winter snowpack, and flows through the desert southwest of the United States. Along the way, it passes...

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USA

Norris Cut Project: Tunneling at Florida’s Coast

In February 2016 construction company Bessac completed work on the Norris Cut protection tunnel in extremely difficult geology in South Florida. Norris Cut is a shallow inlet between Fisher Island and...

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Issue 2016-07 USA

Norris Cut Projekt: Tunneling at Florida’s Coast

In February 2016 construction company Bessac completed work on the Norris Cut protection tunnel in extremely difficult geology in South Florida. Norris Cut is a shallow inlet between Fisher Island and...

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Issue 2011-01 Sweden

The Hallandsas rail tunnel: Successful first-bore breakthrough

Untertiteltext Englisch

The rail link from Malmö to Göteborg on the west coast of Sweden is undergoing upgrading to a high-speed line, cutting travelling times between the two cities by two hours. A particular challenge is...

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